<template>
  <div>
    <Bread></Bread>
    <el-card>
      <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon :closable="false"></el-alert>

      <!-- 级联选择 -->
      <div class="connection">
        <span>选择商品分类：</span>
        <el-cascader
          v-model="selectedCateKeys"
          :options="cateList"
          :props="{
               expandTrigger: 'hover',
               value:'cat_id',
              label:'cat_name',
              children:'children'}"
          @change="handleChange"
        ></el-cascader>

        <!-- 卡片话切换 -->
        <el-tabs type="border-card" v-model="activeName" @tab-click="handleClick">
          <el-tab-pane label="动态参数" name="many">
            <el-button
              type="primary"
              size="mini"
              :disabled="isBtnDisabled"
              @click="addDialogVisible = true"
            >添加参数</el-button>
            <!-- 动态参数表格 -->
            <el-table :data="manyTableData" border>
              <el-table-column type="expand">
                <template v-slot="scope">
                  <el-tag
                    v-for="(item,key) in scope.row.attr_vals"
                    :key="key"
                    closable
                    @close="handleClose(key,scope.row)"
                  >{{item}}</el-tag>
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  ></el-input>
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                  >+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index" label="#"></el-table-column>
              <el-table-column label="参数名称" prop="attr_name"></el-table-column>
              <el-table-column label="操作">
                <template v-slot="scope">
                  <el-button
                    type="primary"
                    icon="el-icon-edit"
                    size="mini"
                    @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button>
                  <el-button
                    type="danger"
                    icon="el-icon-delete"
                    size="mini"
                    @click="removeParams(scope.row.attr_id)"
                  >删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
          <el-tab-pane label="静态属性" name="only">
            <el-button
              type="primary"
              size="mini"
              :disabled="isBtnDisabled"
              @click="addDialogVisible = true"
            >添加属性</el-button>
            <!-- 静态属性表格 -->
            <el-table :data="onlyTableData" border>
              <el-table-column type="expand">
                <template v-slot="scope">
                  <el-tag
                    v-for="(item,key) in scope.row.attr_vals"
                    :key="key"
                    closable
                    @close="handleClose(key,scope.row)"
                  >{{item}}</el-tag>
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  ></el-input>
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                  >+ New Tag</el-button>
                </template>
              </el-table-column>
              <el-table-column type="index" label="#"></el-table-column>
              <el-table-column label="属性名称" prop="attr_name"></el-table-column>
              <el-table-column label="操作">
                <template v-slot="scope">
                  <el-button
                    type="primary"
                    icon="el-icon-edit"
                    size="mini"
                    @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button>
                  <el-button
                    type="danger"
                    icon="el-icon-delete"
                    size="mini"
                    @click="removeParams(scope.row.attr_id)"
                  >删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
        </el-tabs>

        <!-- 添加对话框 -->
        <el-dialog
          :title="'添加' + titleText"
          :visible.sync="addDialogVisible"
          @close="addDialogClosed"
        >
          <el-form ref="addForm" :model="addForm" label-width="100px" :rules="addFormRules">
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
          </el-form>
          <div slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
          </div>
        </el-dialog>

        <!-- 编辑对话框 -->
        <el-dialog
          :title="'编辑' + titleText"
          :visible.sync="editDialogVisible"
          @close="editDialogClosed"
        >
          <el-form ref="editForm" :model="editForm" label-width="100px" :rules="editFormRules">
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
          </el-form>
          <div slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
          </div>
        </el-dialog>
      </div>
    </el-card>
  </div>
</template>
<script>
import Bread from "@/components/breadmenu.vue";
export default {
  components: { Bread },
  data() {
    return {
      cateList: [],
      selectedCateKeys: [],
      activeName: "many",
      manyTableData: [],
      onlyTableData: [],
      //   添加
      addDialogVisible: false,
      addForm: {
        attr_name: ""
      },
      addFormRules: {
        attr_name: [
          {
            required: true,
            message: "请输入参数名称",
            trigger: "blur"
          }
        ]
      },
      //   编辑
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [
          {
            required: true,
            message: "请输入参数名称",
            trigger: "blur"
          }
        ]
      }
    };
  },
  mounted() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.obj
      });
      console.log(res.data);
      this.cateList = res.data;
    },
    handleChange() {
      this.getParamsData();
    },
    handleClick(tab) {
      console.log(tab.name);
      this.getParamsData();
    },
    async getParamsData() {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = [];
        this.manyTableData = [];
        this.onlyTableData = [];
        return;
      }

      console.log(this.selectedCateKeys);

      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName }
        }
      );

      if (res.meta.status !== 200) {
        return this.$message.error("获取参数列表失败");
      }

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        item.inputVisible = false;
        item.inputValue = "";
      });
      console.log(res.data);

      if (this.activeName === "many") {
        this.manyTableData = res.data;
      } else {
        this.onlyTableData = res.data;
      }
    },
    addDialogClosed() {
      this.$refs.addForm.resetFields();
    },
    addParams() {
      this.$refs.addForm.validate(async valid => {
        if (!valid) {
          return false;
        }
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          }
        );
        if (res.meta.status !== 201) {
          return this.$message.error("添加参数失败！");
        }
        this.$message.success("添加参数成功！");
        this.addDialogVisible = false;
        this.getParamsData();
      });
    },
    // 点击编辑显示对话框
    async showEditDialog(attr_id) {
      console.log(attr_id);
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        {
          params: { attr_sel: this.activeName }
        }
      );

      if (res.meta.status !== 200) {
        return this.$message.error("获取参数信息失败！");
      }

      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    editDialogClosed() {
      this.$refs.editForm.resetFields();
    },
    editParams() {
      this.$refs.editForm.validate(async valid => {
        if (!valid) return;
        const {
          data: res
        } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("修改参数失败！");
        }

        this.$message.success("修改参数成功！");
        this.getParamsData();
        this.editDialogVisible = false;
      });
    },
    // 点击删除
    removeParams(attr_id) {
      this.$confirm("此操作将永久删除该文件, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(
            `categories/${this.cateId}/attributes/${attr_id}`
          );

          if (res.meta.status == 200) {
            this.$message({
              type: "success",
              message: "删除成功!"
            });
            this.getParamsData();
          }
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除"
          });
        });
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = "";
        row.inputVisible = false;
        return;
      }

      row.attr_vals.push(row.inputValue.trim());
      row.inputValue = "";
      row.inputVisible = false;

      this.saveAttrVals(row);
    },
    async saveAttrVals(row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(" ")
        }
      );

      if (res.meta.status !== 200) {
        return this.$message.error("修改参数项失败！");
      }

      this.$message.success("修改参数项成功！");
    },
    showInput(row) {
      row.inputVisible = true;
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    handleClose(key, row) {
      row.attr_vals.splice(key, 1);
      this.saveAttrVals(row);
    }
  },
  computed: {
    //   如果按钮需要被禁用，则返回true，否则返回false
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true;
      }
      return false;
    },
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        console.log(this.selectedCateKeys[2]);
        return this.selectedCateKeys[2];
      }
      return null;
    },
    titleText() {
      if (this.activeName === "many") {
        return "动态参数";
      }
      return "静态属性";
    }
  }
};
</script>
<style lang="scss" scoped>
.el-card {
  margin-top: 10px;
}
.connection {
  margin-top: 20px;
}
.el-tabs {
  margin-top: 15px;
}
.el-table {
  margin-top: 15px;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 100px;
}
</style>